/*
 * Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements. See the NOTICE
 * file distributed with this work for additional information regarding copyright ownership. The ASF licenses this file
 * to You under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the
 * License. You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
 * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
 * specific language governing permissions and limitations under the License.
 *
 */

package com.spark.sniffer.plugin.interceptor.enhance;

import java.lang.reflect.Method;

import com.spark.sniffer.logging.api.Logger;
import com.spark.sniffer.logging.api.LoggerFactory;
import com.spark.sniffer.plugin.loader.InterceptorInstanceLoader;

import net.bytebuddy.implementation.bind.annotation.AllArguments;
import net.bytebuddy.implementation.bind.annotation.Morph;
import net.bytebuddy.implementation.bind.annotation.Origin;
import net.bytebuddy.implementation.bind.annotation.RuntimeType;
import net.bytebuddy.implementation.bind.annotation.This;

/**
 * The actual byte-buddy's interceptor to intercept class instance methods. In this class, it provide a bridge between
 * byte-buddy and sky-walking plugin.
 *
 * @author wusheng
 */
public class InstMethodsInterWithOverrideArgs {
    private static final Logger logger = LoggerFactory.getLogger(InstMethodsInterWithOverrideArgs.class);
    /**
     * An {@link InstanceMethodsAroundInterceptor} This name should only stay in {@link String}, the real {@link Class}
     * type will trigger classloader failure. If you want to know more, please check on books about Classloader or
     * Classloader appointment mechanism.
     */
    private InstanceMethodsAroundInterceptor interceptor;

    /**
     * @param instanceMethodsAroundInterceptorClassName class full name.
     * @throws Exception
     */
    public InstMethodsInterWithOverrideArgs(String instanceMethodsAroundInterceptorClassName, ClassLoader classLoader)
        throws Exception {
        interceptor = InterceptorInstanceLoader.load(instanceMethodsAroundInterceptorClassName, classLoader);
    }

    /**
     * Intercept the target instance method.
     *
     * @param obj target class instance.
     * @param allArguments all method arguments
     * @param method method description.
     * @param zuper the origin call ref.
     * @return the return value of target instance method.
     * @throws Exception only throw exception because of zuper.call() or unexpected exception in sky-walking ( This is a
     *         bug, if anything triggers this condition ).
     */
    @RuntimeType
    public Object intercept(@This Object instance, @AllArguments Object[] allArguments, @Origin Method method,
        @Morph OverrideCallable zuper) throws Throwable {
        MethodInterceptResult result = new MethodInterceptResult();
        try {
            interceptor.beforeMethod(instance, method, allArguments, method.getParameterTypes(), result);
        } catch (Throwable t) {
            logger.error(t, "class[{}] before method[{}] intercept failure", instance.getClass(), method.getName());
        }

        Object ret = null;
        try {
            if (!result.isContinue()) {
                ret = result._ret();
            } else {
                ret = zuper.call(allArguments);
            }
        } catch (Throwable t) {
            try {
                interceptor.handleMethodException(instance, method, allArguments, method.getParameterTypes(), t);
            } catch (Throwable t2) {
                logger.error(t, "class[{}] handle method[{}] exception failure", instance.getClass(), method.getName());
            }
            throw t;
        } finally {
            try {
                ret = interceptor.afterMethod(instance, method, allArguments, method.getParameterTypes(), ret);
            } catch (Throwable t) {
                logger.error(t, "class[{}] after method[{}] intercept failure", instance.getClass(), method.getName());
            }
        }
        return ret;
    }
}
